Edward clark



H "(No ModeL) I E. CLARK.

' KING BOLT PLATE.

Patented Oct. .229, 1895,

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INVENTOI? ATTORNEYS;

ANDREW EGIKHIAM. PHUTD-UTHQWASHIIGTDILDC'.

UNITED STATES PATENT OFFIC EDWARD oLARinon NEW YORK, Y.

KING-BOLT PLATE.

SPECIFICATION forming part of Letters Patent No. 548,957, dated October 29,1895.

A nmai filed October 10,1894. Serial 110.5%,493. (No model.)

To all whom it may concern:

Be it known that I, EDWARD CLARK, of'

The invention consists principally of a bottom plate formed with a central hub and in its top surface with an annular groove semicircular in cross-section and a bolster-receiving plate formed with a central aperture for receiving the said hub and provided at its under side with an annular bead fitted into the said recess.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement as applied. Fig. 2 is a plan view of the improvement. Fig. 3 is an enlarged sectional side elevation of part of the same on the line 3 3 of Fig. 2, and Fig. 4 is a perspective view of one of the bearing-bands.

The king-bolt plates A and B are fastened by bolts in the usual manner to the bolster O and the axle-bar D, respectively, as illus' trated in Fig. 1. The bottom plate B is formed with a vertically-disposed hub B, through which passes the king-bolt E, as indicated in dotted lines in Fig. 1, and concentric with the said hub B is an annular groove B made semicircular in cross-section and formed in the top of the plate B, as illustrated in the drawings. Into this annular recess 13 extends and fits the annular bead A, formed on the under side of the plate A and likewise semicircular in cross-section. The annular bead A encircles the central aperture, into which projects the hub B, the latter being flush at its upper end with the top surface of the plate A. On the under side of the plate A and concentric to the head A is formed a raised ring-shaped wearing-surface A in contact with a correspondingly-raised surface B formed on the top of the plate B.

In the wall of the opening of the plate A is formed a recess A into which fits a bearing-band F, adapted to contact with a corresponding bearing-band G, held in a recess formed exteriorly on the upper end of the hub B, as is plainly shown in Fig. 3. The bearing-oands F and G are preferably made of steel and are split,as indicated in Figs. 2 and 4, the ends of the band F abutting against a projection A extending from the plateA'into the recess A and the ends of the band G likewise abut against opposite sides of a projection B formed on the hub B and'extendin into the recess B Now by reference to Fig. 2 it will be seen that the projections A and B are disposed in difierent places, so that the ends of the bands do not come over each other when the vehicle is turning around a curve.

It will be seen that by the arrangement described the bearing-bands F and G can be conveniently removed from their recesses and replaced by new on es when worn out, and'the said bands are prevented from turning in their recesses on account of abutting on the projections A and B It will further be seen that by fitting the annular head A into a correspondingly-shaped groove B in the plate B, I reduce the friction between the plates to a minimum, at the same time relieving the king-bolt E and the bolts for fastening the plates in position of all strain. As the bead, owing to its peculiar cross-section, presents no sharp corners in contact with the wearingsurface on the plate B, the truck is free to turn readily around curves or street-corners, 5

projection extending into the recess, substan tially as shown and described.

3. A bottom plate formed with a central king bolt hub having an exterior recess, and a split bearing band, fitted into the said recess and abutting with its ends on opposite sides of a projection formed on the hub and extending into the said recess, substantially as shown and described.

EDXVARD CLARK.

Witnesses:

THEo. G. HOSTER, O. SEDG IcK. 

